<template>
  <div>
    <!-- 顶部滑动区域 -->
    <div id="slider" class="mui-slider">
      <div
        id="sliderSegmentedControl"
        class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted"
      >
        <div class="mui-scroll">
          <a
            class="mui-control-item"
            href="#item2mobile"
            data-wid="tab-top-subpage-2.html"
            v-for="item in cates"
            :key="item.id"
            @click="getPhoto(item.id)"
          >{{item.title}}</a>
        </div>
      </div>
    </div>
    <!-- 图片列表区域 -->
    <ul class="photo-list">
      <router-link v-for="item in list" :key="item.id" :to=" '/home/photoinfo/'+item.id" tag="li">
        <img v-lazy="item.img_url">
        <div class="info">
            <p>{{item.title}}</p>
            <div>{{item.zhaiyao}}</div>
        </div>
      </router-link>
    </ul>
  </div>
</template>
<script>
// 导入mui的js文件
import mui from "../../lib/mui/js/mui.min.js";
export default {
  data() {
    return {
      cates: [],
      list: []
    };
  },
  created() {
    this.getCategory(), this.getPhoto(0);
  },
  mounted() {
    // 当组件中的DOM结构被渲染好并放到页面中后，会执行这个函数
    // 如果要操作元素了，最好在mounted里面，因为这里的DOM元素是最新的
    // 初始化滑动组件
    mui(".mui-scroll-wrapper").scroll({
      deceleration: 0.0005 //flick 减速系数，系数越大，滚动速度越慢，滚动距离越小，默认值0.0006
    });
  },
  methods: {
    //获取滑动条的分类
    getCategory() {
      this.$http.get("api/getimgcategory").then(result => {
        if (result.body.status === 0) {
          result.body.message.unshift({ title: "全部", id: 0 });
          this.cates = result.body.message;
        }
      });
    }, //获取图片
    getPhoto(cateid) {
      this.$http.get("api/getimages/" + cateid).then(result => {
        if (result.body.status === 0) {
          this.list = result.body.message;
        }
      });
    }
  }
};
</script>

<style lang="scss" scoped>
* {
  touch-action: pan-y;
}
.photo-list {
  list-style: none;
  padding: 10px;
  margin: 0;
  img {
    width: 100%;
    vertical-align: middle;
    box-shadow: 0 0 8px #999;
    z-index:1;
  }
  li {
    position: relative; 
    margin-bottom: 10px;
    background-color: #ccc;
    image[lazy="loading"] {
      width: 40px;
      height: 300px;
      margin: auto;
    }
    text-align: center;
    .info{
        position: absolute;
        bottom: 0;
        text-align:left;
        color:white;
        p{
            color:white;
            font-size:16px;
            font-weight: bold;
        }
        div{
            font-size:13px;
        }
    }
  }
}
</style>

